In 1983, Asta Electrical (S) Pte Ltd also known as Asta Engineering Co. was established by Mr. Toh S.T. as a marketing and distribution company in Singapore for the supply of panel meters and electrical switchboard components.

We stalwartly believe that for sustainable business growth, reliable product qualities are as important as working with the right business partners who shared similar visions.

In 1994, Howard Butler Manufacturing Pte Ltd, a joint venture between Howard Butler Ltd (UK) and Asta Electrical (S) Pte Ltd was established. The technology of manufacturing current transformers with stringent quality control measures and techniques were adopted from Howard Butler Ltd (UK) to meet the rapid demands of manufacturing requirements for current transformers in Singapore.  Both companies are fully committed and adhere to the philosophy:


Asta Electrical (S) Pte Ltd is officially appointed as the Sole Agent of HOBUT range of products in the Asia region.

Howard Butler Ltd is one of the largest independent United Kingdom manufacturers and suppliers of HOBUT brand current transformers, panel meters, shunts and associated products, with over 100 years’ experience in the industry.    HOBUT products have built up a reputation for quality and modern designs throughout the years.  She has a team of Specialist Engineers available to offer technical and products applications requirements.

In 1995 and 1996, Howard Butler Manufacturing Pte Ltd achieved product accreditations for HOBUT current transformers by ASTA Certification Services (England).

In 2000, Asta Electrical (S) Pte Ltd and Howard Butler Manufacturing Pte Ltd were re-located to the current address.  In the same year, Howard Butler Manufacturing Pte Ltd began to export locally manufactured HOBUT current transformers to regional overseas markets.

In 2001, Howard Butler Manufacturing Pte Ltd achieved the international standard of ISO 9001:2000 approval to attain the objective of Quality Assurance and to ensure that our products, in all respects, meet the specified quality standards and those of the customers.  The HOBUT current transformers further achieved product accreditation by ASTA Certification Services (Australia).

In 2010, both Asta Electrical (S) Pte Ltd and Howard Butler Manufacturing Pte Ltd achieved the international standard of ISO 9001:2000 approval and to date replaced by the ISO 9001:2008 standard.

Asta Electrical (S) Pte Ltd is also the Exclusive Distributor for BIGMZENCO, HANLEY, HOPPY, MACK, MIRO, SECO, ZYEC and the Distributor for HITACHI, ITRON/ACTARIS, KACON, KRAUS & NAIMER, LEGRAND, MERSEN and MITSUBISHI.

We continue to work very closely with our partners and strive to supply our clientele with reliable products.





The Company's philosophy is to be one of the best in the industry by providing quality &
reliable products to meet customers' requirements through

“Total Commitment to the development and implementation of the effective quality
management systems for continuous product improvements.”

Mr. S. T. Toh, Managing Director